| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dilatation balloon material, having suitable balance of competing property. <P>SOLUTION: This self-wrapping dilatation balloon includes: multiblock copolymer having high elasticity and elastic recovery from nominal strains about 30% or more. Polymeric extrudate for making a dilatation balloon including multiblock polymer having tensile strength ranging from about 50 MPa to about 450 MPa, strain at break in the range of about 50% to about 600% and substantially complete elastic recovery from the nominal strains of at least about 30%. The extrudate has phase-separation micro-domains that are macroscopically aligned in parallel, perpendicular, transverse or a combination thereof. The manufacturing method of the polymeric extrudate for use as a dilatation balloon is described in this specification. The method includes a step of extruding multiblock copolymer mixture or composite material to form an extrudate. The extrusion is performed so that the extrudate has phase-separated micro-domains that are macroscopically aligned in parallel, perpendicular, transverse or a combination thereof. After extrusion, the method includes a process of drawing the extrudate and coagulating the same at need. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
